21143187

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1$

素因数の和:151

約数の個数: 56

約数和(自身を含む): 35990304

約数和(自身を除く): 14847117

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 97, 117, 207, 243, 291, 299, 351, 621, 729, 873, 897, 1053, 1261, 1863, 2231, 2619, 2691, 3159, 3783, 5589, 6693, 7857, 8073, 9477, 11349, 16767, 20079, 23571, 24219, 29003, 34047, 60237, 70713, 72657, 87009, 102141, 180711, 217971, 261027, 306423, 542133, 783081, 919269, 1626399, 2349243, 7047729, 21143187]

約数ペア:

[(1, 21143187), (3, 7047729), (9, 2349243), (13, 1626399), (23, 919269), (27, 783081), (39, 542133), (69, 306423), (81, 261027), (97, 217971), (117, 180711), (207, 102141), (243, 87009), (291, 72657), (299, 70713), (351, 60237), (621, 34047), (729, 29003), (873, 24219), (897, 23571), (1053, 20079), (1261, 16767), (1863, 11349), (2231, 9477), (2619, 8073), (2691, 7857), (3159, 6693), (3783, 5589)]